/*
 * OREKIT-X
 * Copyright 2002-2008 CS Communication & Systemes
 * 
 * Parts of this software package have been licensed to CS
 * Communication & Systemes (CS) under one or more contributor license
 * agreements.  See the NOTICE file distributed with this work for
 * additional information.
 *  
 * This is an experimental copy of OREKIT from www.orekit.org.
 * Please use the original OREKIT from orekit.org for normal work
 * unrelated to this research project.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License.  You
 * may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 */
package ore.frames;

import ore.Frame;
import ore.Transform;
import ore.errors.FrameAncestorException;
import ore.errors.OrekitException;
import ore.time.AbsoluteDate;

/** 
 * Base class for frames using Neville's algorithm.
 * 
 * @see TEMEFrame
 * @see PEFFrame
 * @see CIRF2000Frame
 * 
 * @author Pascal Parraud
 * @author John Pritchard
 */
public abstract class NevilleFrame
    extends ore.Frame
{
    /**
     * Number of interpolated points
     */
    public final static int N = 12;

    /**
     * "Left-central" date of the interpolation array.
     */
    protected double tCenter;
    /** 
     * Step size of the interpolation array.
     */
    public final double h;


    public NevilleFrame(Frame parent, Transform transform, String name, double h)
        throws IllegalArgumentException
    {
        super(parent,transform,name);
        this.h = h;
        this.tCenter  = Double.NaN;
    }
}
